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| 7833121650 | acid | A substance that increases the hydrogen ion concentration of a solution. |  | 0 |
| 7833121651 | base | A substance that decreases the hydrogen ion concentration in a solution. |  | 1 |
| 7833121652 | amino acid | Monomer of Proteins |  | 2 |
| 7833121653 | carbohydrate | Class of nutrients that includes sugars and starches |  | 3 |
| 7833121654 | cellulose | Carbohydrate component of plant cell walls. |  | 4 |
| 7833121655 | covalent bond | A chemical bond that involves sharing a pair of electrons between atoms in a molecule |  | 5 |
| 7833121656 | denature | A process in which a protein unravels, losing its specific structure and hence function; can be caused by changes in pH or salt concentration or by high temperature. Also refers to the separation of the two strands of the DNA double helix, caused by similar factors. |  | 6 |
| 7833121657 | disaccharide | A double sugar molecule made of two monosaccharides bonded together through dehydration synthesis. |  | 7 |
| 7833121658 | DNA | Deoxyribonucleic acid. A double-stranded, helical nucleic acid molecule capable of replicating and determining the inherited structure of a cell's proteins. |  | 8 |
| 7833121659 | double helix | The form of native DNA, referring to its two adjacent polynucleotide strands wound into a spiral shape. |  | 9 |
| 7833121660 | enzyme | A type of protein that speeds up a chemical reaction in a living thing |  | 10 |
| 7833121661 | fat | A large lipid molecule made from an alcohol called glycerol and three fatty acids; a triglyceride. Most function as energy-storage molecules. |  | 11 |
| 7833121662 | fatty acid | Monomer of lipids, along with glycerol |  | 12 |
| 7833121663 | glucose | C6H12O6 |  | 13 |
| 7833121664 | glycogen | An extensively branched glucose storage polysaccharide found in the liver and muscle of animals; the animal equivalent of starch. |  | 14 |
| 7833121665 | hydrogen bond | A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule. |  | 15 |
| 7833121666 | hydrolysis reaction | A chemical reaction that breaks apart a larger molecule by adding a molecule of water |  | 16 |
| 7833121667 | inorganic molecule | Molecules that do not contain the element carbon (in most cases) |  | 17 |
| 7833121668 | ion | A particle that is electrically charged (positive or negative) |  | 18 |
| 7833121669 | atom | Smallest unit of matter that still retains the properties of an element |  | 19 |
| 7833121670 | ionic bond | A chemical bond resulting from the attraction between oppositely charged ions. Transfer of one or more electrons to one atom to another |  | 20 |
| 7833121671 | lipid | Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen. |  | 21 |
| 7833121672 | molecule | A group of atoms held together by covalent bonds. |  | 22 |
| 7833121673 | monomer | A simple compound whose molecules can join together to form polymers |  | 23 |
| 7833121674 | monosaccharide | A single sugar molecule such as glucose or fructose, the simplest type of sugar. |  | 24 |
| 7833121675 | nucleotide | A building block of DNA, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group. |  | 25 |
| 7833121676 | oil | Triglyceride, usually of plant origin that is liquid form |  | 26 |
| 7833121677 | organic molecule | A molecule containing carbon that is a part of or produced by living systems. | 27 | |
| 7833121678 | fructose | A five carbon sugar molecule |  | 28 |
| 7833121679 | phospholipid | A lipid made up of a glyerol joined to two fatty acids and a phosphate group; has two hydrophobic tails and a polar, hydrophilic head |  | 29 |
| 7833121680 | pH scale | measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges from 0 to 14 |  | 30 |
| 7833121681 | polar covalent bond | A covalent bond in which electrons are not shared equally |  | 31 |
| 7833121682 | polymer | A long molecule consisting of many similar or identical monomers linked together. |  | 32 |
| 7833121683 | polypeptide | A polymer (chain) of many amino acids linked together by peptide bonds. |  | 33 |
| 7833121684 | polysaccharide | Carbohydrates that are made up of more than two monosaccharides |  | 34 |
| 7833121685 | protein | A three dimensional polymer made of monomers of amino acids. |  | 35 |
| 7833121686 | saturated fatty acid | A fatty acid in which all carbons in the hydrocarbon tail are connected by single bonds, thus maximizing the number of hydrogen atoms that can attach to the carbon skeleton. |  | 36 |
| 7833121687 | solute | A substance that is dissolved in a solution. |  | 37 |
| 7833121688 | solvent | A liquid substance capable of dissolving other substances |  | 38 |
| 7833121689 | starch | A storage polysaccharide in plants consisting entirely of glucose. |  | 39 |
| 7833121690 | steroid | A type of lipid characterized by a carbon skeleton consisting of four rings with various functional groups attached. |  | 40 |
| 7833121691 | trigyceride | The form of fat storage in adipose cells; consists of a molecule of glycerol joined with three fatty acids. |  | 41 |
| 7833121692 | unsaturated fatty acid | A fatty acid possessing one or more double bonds between the carbons in the hydrocarbon tail. Such bonding reduces the number of hydrogen atoms attached to the carbon skeleton. |  | 42 |
| 7833121693 | Properties of Water | Adhesion, cohesion, surface tension, density decreases when freezing, polar covalent bonds | 43 | |
| 7833152553 | The _______ _______ that make up an atom are protons, nuetrons, and electrons | subatomic | 44 | |
| 7833163922 | Nucleus | bonding of protons and neutrons, center of the atom | 45 | |
| 7833191569 | Atoms of the same elements that differ in the number of neutrons they contain are _____ | isotopes | 46 | |
| 7833232315 | a chemical ______ is a substance formed by the chemical combination of two or more elements in definite proportions | compound | 47 | |
| 7833250852 | The electrons that are available to form bonds are called ____ | valence electrons | 48 | |
| 7833272209 | ions | positively and negatively charged atoms | 49 | |
| 7833339178 | polar | a molecule in which the charges are unevenly distributed | 50 |
